JP3169395B2 - Collection and reproduction method of multilayer film - Google Patents
Collection and reproduction method of multilayer filmInfo
- Publication number
- JP3169395B2 JP3169395B2 JP19320191A JP19320191A JP3169395B2 JP 3169395 B2 JP3169395 B2 JP 3169395B2 JP 19320191 A JP19320191 A JP 19320191A JP 19320191 A JP19320191 A JP 19320191A JP 3169395 B2 JP3169395 B2 JP 3169395B2
- Authority
- JP
- Japan
- Prior art keywords
- polypropylene
- multilayer film
- nylon
- layer
- molecular weight
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ポリプロピレン層、接
着層、ナイロン層からなる透明多層フィルムのスラップ
を回収再生する方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for recovering and recycling a slap of a transparent multilayer film comprising a polypropylene layer, an adhesive layer and a nylon layer.
【０００２】[0002]
【従来の技術】ポリプロピレン層、接着層、ナイロン層
からなる透明多層フィルムは、特徴ある物性を備えてい
る。従来より、この多層フィルムのスクラップを回収再
生しようという試みはされていたが、ポリプロピレンと
ナイロンは相溶性が悪く、不均一な相分離を生じやす
く、著しく外観を損ねるとともに、透明性についても、
実用可能なものが得られず、スクラップの回収再生とい
うものは、全くされていないのが実情であった。2. Description of the Related Art A transparent multilayer film comprising a polypropylene layer, an adhesive layer and a nylon layer has characteristic physical properties. Conventionally, attempts have been made to collect and recycle the scraps of this multilayer film, but polypropylene and nylon have poor compatibility, tend to cause non-uniform phase separation, significantly impair the appearance, and transparency.
In practice, no practical product was obtained, and scrap recovery and recycling were not performed at all.
【０００３】[0003]
【発明が解決しようとする課題】本発明は、ポリプロピ
レン層、接着層、ナイロン層からなる透明多層フィルム
のスクラップに低分子量ポリプロピレンを配合すること
により、相溶性が著しく改善され、透明性、外観に優
れ、回収再生を可能にすることを目的とするものであ
る。SUMMARY OF THE INVENTION According to the present invention, the compatibility of a transparent multilayer film comprising a polypropylene layer, an adhesive layer and a nylon layer is significantly improved by blending a low molecular weight polypropylene with the scrap to improve the transparency and appearance. It is intended to enable excellent recovery and regeneration.
【０００４】[0004]
【課題を解決するための手段】本発明は、ポリプロピレ
ン層、接着層、ナイロン層からなる透明多層フィルムの
スクラップに平均分子量が20000以下であるカルボン酸
又はその無水物を化学的に結合してなる変性低分子量ポ
リプロピレンを添加することを特徴とする多層フィルム
の回収再生方法に関するものである。カルボン酸は、特
にマレイン酸又はフマル酸であることが好ましい。 Means for Solving the Problems The present invention is a polypropylene layer, an adhesive layer, an average molecular weight in the scrap transparent multilayer film comprising a nylon layer 20000 chemically bonded to der Luke carboxylic acid or anhydride or less The present invention relates to a method for collecting and regenerating a multilayer film, characterized by adding a modified low molecular weight polypropylene. Carboxylic acids are
Preferably, it is maleic acid or fumaric acid.
【０００５】本発明に用いられる透明多層フィルムは、
ポリプロピレン層、接着層、ナイロン層からなる。ポリ
プロピレン層としては、結晶性のポリプロピレンであ
り、ポリプロピレンのホモポリマーのほかにポリプロピ
レンと、例えばエチレン、ブテン−１などのα−オレフ
ィンとを共重合させたブロックまたは、ランダムコポリ
マー等を含み、また、これらの不飽和カルボン酸または
その無水物による変性物を単独または２種以上ブレンド
して用いることができる。またこれらは、単層及び多層
としても使用できる。[0005] The transparent multilayer film used in the present invention comprises:
It consists of a polypropylene layer, an adhesive layer and a nylon layer. The polypropylene layer is a crystalline polypropylene, other than a homopolymer of polypropylene, for example, a block obtained by copolymerizing polypropylene and an α-olefin such as ethylene or butene-1, or a random copolymer, and the like. These unsaturated carboxylic acids or their modified products with anhydrides can be used alone or in combination of two or more. They can also be used as single layers and multilayers.
【０００６】接着層としては、高密度ポリエチレン、中
密度ポリエチレン、低密度ポリエチレン、直鎖低密度ポ
リエチレン、エチレン−α−オレフィン共重合体、エチ
レン−ポリプロピレン共重合体、エチレン−酢酸ビニル
共重合体、ポリプロピレン等の樹脂にアクリル酸、メタ
クリル酸などの一塩基性不飽和脂肪酸又はマレイン酸、
フマル酸、イタコン酸などの二塩基性不飽和脂肪酸、更
にはこれらの無水物を化学的に結合して得られるもの、
酢酸ビニル含量１５％以上のエチレン−酢酸ビニル共重
合体、エチレン−無水マレイン酸共重合体、エチレン−
メチルメタクリレート−グリシジルアクリレート３元共
重合体を単独又は２種以上ブレンドして用いることがで
きる。As the adhesive layer, high density polyethylene, medium density polyethylene, low density polyethylene, linear low density polyethylene, ethylene-α-olefin copolymer, ethylene-polypropylene copolymer, ethylene-vinyl acetate copolymer, Acrylic acid to resins such as polypropylene, monobasic unsaturated fatty acids such as methacrylic acid or maleic acid,
Fumaric acid, dibasic unsaturated fatty acids such as itaconic acid, and those obtained by chemically bonding these anhydrides,
Ethylene-vinyl acetate copolymer having a vinyl acetate content of 15% or more, ethylene-maleic anhydride copolymer, ethylene-
Methyl methacrylate-glycidyl acrylate terpolymer can be used alone or as a blend of two or more.
【０００７】ナイロン層としては、ナイロン−６、ナイ
ロン−１１、ナイロン−１２などのポリラクタム類、ナ
イロン−６，６、ナイロン−６，１０、ナイロン６−１
２などのジカルボン酸とジアミンとから得られるポリア
ミド類、ナイロン−６／６，６、ナイロン−６／６，１
０、ナイロン−６／６，１１、ナイロン−６／６，１
２、ナイロン−６／６，６／６，１０、ナイロン−６／
６，６／６，１２、ナイロン−６／６Ｔ（Ｔ；テレフタ
ル酸成分）などの共重合ポリアミド類、またこれらの混
合物などの高アミノ末端ポリアミドが挙げられる。これ
らは、単層及び多層としても使用できる。As the nylon layer, polylactams such as nylon-6, nylon-11 and nylon-12, nylon-6,6, nylon-6,10 and nylon6-1
Polyamides obtained from dicarboxylic acids such as No. 2 and diamines, nylon-6 / 6,6, nylon-6 / 6,1
0, nylon-6 / 6,11, nylon-6 / 6,1
2, nylon-6 / 6,6 / 6,10, nylon-6 /
Copolymerized polyamides such as 6,6 / 6,12 and nylon-6 / 6T (T; terephthalic acid component), and highly amino-terminated polyamides such as a mixture thereof. These can also be used as single layers and multilayers.
【０００８】また、本発明に用いられる平均分子量が20
000以下であるカルボン酸又はその無水物を化学的に結
合してなる変性低分子量ポリプロピレンは、多層フィル
ムを回収再生する際の溶融混練で、回収品を単に溶融混
練する、或いはバージン原料を添加するだけでは到達す
ることのできないレベルまでナイロンを微細分散させ、
回収品の透明化を行うものである。その為、主構造とし
てはポリプロピレンとの相溶性が良く、更に混練時の拡
散、分散性の高い低分子量のものが好ましい。また透明
化回収可能レベルまでナイロンを微細分散させる為には
酸変性を行うことが必要である。本発明に用いられる平
均分子量が20000以下であるカルボン酸又はその無水物
を化学的に結合してなる変性低分子量ポリプロピレン
は、これらの酸又は無水物を化学的に結合して得られる
ものであり、中でも、平均分子量が１０００〜１２００
０のポリプロピレンオリゴマーの末端を無水マレイン酸
変性したもので、その含有量が５重量％以上のものが特
に好ましい。Further, the average molecular weight used in the present invention is 20
000 following Der Luke carboxylic acid or modified low molecular weight polypropylene obtained by chemically bonding the anhydride, a melt-kneading at the time of recovery and recycling of the multilayer film, simply melt-kneaded collection items, or virgin raw material Finely disperse nylon to a level that cannot be reached just by adding it,
This is to make the collected products transparent. Therefore, it is preferable that the main structure has a low molecular weight, which has good compatibility with polypropylene and high diffusion and dispersibility during kneading. In order to finely disperse nylon to a level at which the nylon can be made transparent and recoverable, it is necessary to carry out acid modification. Chemically bound modified low molecular weight polypropylene made by the average molecular weight of 20,000 or less der Luke carboxylic acids or anhydrides thereof used in the present invention, these acids or anhydrides which are obtained by chemically binding In particular, the average molecular weight is 1000 to 1200
It is particularly preferable that the terminal of the polypropylene oligomer of No. 0 is modified with maleic anhydride and the content is 5% by weight or more.
【０００９】本発明の多層フィルムのスクラップを粉砕
機あるは、造粒機等によって、粒状にしたものに、低分
子量ポリプロピレンをブレンドし、共押出法等公知の方
法でフィルムにすることができる。また、混練の際、Ｌ
／Ｄが２５以上の２軸押出機を使用すると、混練が十分
であり、より効果的である。The scrap of the multilayer film of the present invention can be made into a film by a known method such as a co-extrusion method by blending a low molecular weight polypropylene with a granulated material such as a pulverizer or a granulator. When kneading, L
When a twin screw extruder having a / D of 25 or more is used, kneading is sufficient, and this is more effective.
【００１０】[0010]
【実施例】以下実施例により本発明を説明するが、これ
は単なる例示であり、本発明はこれに限定されるもので
はない。なお、実施例では透明多層フィルムのスクラッ
プとして、ポリプロピレン層としてはポリプロピレン−
エチレン・ポリプロピレンブロックコポリマー（厚み６
０μｍ）、接着層としてはポリプロピレン−エチレン・
ポリプロピレンブロックコポリマーを無水マレイン酸変
性したもの（厚み１０μｍ）、ナイロン層としてはナイ
ロン−６／６，６（厚み３０μｍ）の共押出フィルムを
造粒機でペレット化したものを使用した。EXAMPLES The present invention will be described below by way of examples, which are merely examples, and the present invention is not limited thereto. In the examples, as the scrap of the transparent multilayer film, the polypropylene layer was polypropylene-
Ethylene / polypropylene block copolymer (thickness 6
0 μm), and the adhesive layer is polypropylene-ethylene.
A polypropylene block copolymer modified with maleic anhydride (thickness: 10 μm), and a nylon layer formed by pelletizing a nylon-6 / 6,6 (thickness: 30 μm) coextruded film with a granulator were used.
【００１１】（実施例１〜３）共押出フィルムを造粒機
でペレット化したものに平均分子量が４０００のポリプ
ロピレンオリゴマーの末端を無水マレイン酸変性したも
ので、その含有量が約５重量％のものを、５，１０，２
０重量部加え、Ｌ／Ｄ＝４０の２軸押出機で混練後、Ｔ
−ダイ法で厚み１００μｍのフィルムを製造した。(Examples 1 to 3) A co-extruded film pelletized by a granulator was prepared by modifying the terminal of a polypropylene oligomer having an average molecular weight of 4,000 with maleic anhydride and having a content of about 5% by weight. Things, 5, 10, 2
0 parts by weight, and after kneading with a twin screw extruder with L / D = 40, T
A film having a thickness of 100 μm was produced by a die method.
【００１２】（実施例４〜６）共押出フィルムを造粒機
でペレット化したものに平均分子量が１２０００のポリ
プロピレンオリゴマーの末端を無水マレイン酸変性した
もので、その含有量が約１０重量％のものを、５，１
０，２０重量部加え、Ｌ／Ｄ＝４０の２軸押出機で混練
後、Ｔ−ダイ法で厚み１００μｍのフィルムを製造し
た。(Examples 4 to 6) A co-extruded film pelletized by a granulator was prepared by modifying the terminal of a polypropylene oligomer having an average molecular weight of 12,000 with maleic anhydride, and having a content of about 10% by weight. Things, 5, 1
After adding 0.20 parts by weight and kneading with a twin screw extruder with L / D = 40, a film having a thickness of 100 μm was produced by a T-die method.
【００１３】（比較例１）共押出フィルムを造粒機でペ
レット化したものをＬ／Ｄ＝４０の２軸押出機で混練
後、Ｔ−ダイ法で厚み１００μｍのフィルムを製造し
た。これらの結果を表１に示す。(Comparative Example 1) A pelletized co-extruded film was kneaded with a twin-screw extruder (L / D = 40), and then a 100-μm-thick film was produced by a T-die method. Table 1 shows the results.
【００１４】[0014]
【表１】 [Table 1]
【００１５】[0015]
【発明の効果】本発明方法に従うと、従来回収再生が不
可能であったポリプロピレン層、接着層、ナイロン層か
らなる透明多層フィルムのスクラップの回収再生が容易
に行え、スクラップの廃棄が不用になるとともに、コス
トダウンにもなる。According to the method of the present invention, it is possible to easily recover and recycle scraps of a transparent multilayer film composed of a polypropylene layer, an adhesive layer and a nylon layer, which could not be recovered and regenerated in the past, thereby eliminating the need for scrap disposal. At the same time, costs are reduced.
Claims (2)
層からなる透明多層フィルムのスクラップに平均分子量
が20000以下であるカルボン酸又はその無水物を化学的
に結合してなる変性低分子量ポリプロピレンを配合する
ことを特徴とする多層フィルムの回収再生方法。1. A polypropylene layer, an adhesive layer and blended scrap average molecular weight is chemically bonded to 20,000 or less der Luke carboxylic acid or anhydride-modified low molecular weight polypropylene of a transparent multilayer film comprising a nylon layer A method for collecting and reproducing a multilayer film.
である請求項１記載の多層フィルムの回収再生方法。The method for collecting and reproducing a multilayer film according to claim 1, wherein
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19320191A JP3169395B2 (en) | 1991-08-01 | 1991-08-01 | Collection and reproduction method of multilayer film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19320191A JP3169395B2 (en) | 1991-08-01 | 1991-08-01 | Collection and reproduction method of multilayer film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0532817A JPH0532817A (en) | 1993-02-09 |
| JP3169395B2 true JP3169395B2 (en) | 2001-05-21 |
Family
ID=16303986
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19320191A Expired - Fee Related JP3169395B2 (en) | 1991-08-01 | 1991-08-01 | Collection and reproduction method of multilayer film |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3169395B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6623641B1 (en) | 1998-06-04 | 2003-09-23 | New Zealand Forest Research Institute Limited | Wastewater treatment process for nitrogen-deficient feed in controlled environment |
| JP2017012659A (en) * | 2015-07-06 | 2017-01-19 | 有限会社 阪上販売 | Wetting prevention film for umbrella |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016087892A (en) * | 2014-10-31 | 2016-05-23 | 住友ベークライト株式会社 | Multilayered film and method for producing the same |
| JP6687258B2 (en) * | 2018-05-08 | 2020-04-22 | 株式会社Ｍｓｃ | How to play composite film |
-
1991
- 1991-08-01 JP JP19320191A patent/JP3169395B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6623641B1 (en) | 1998-06-04 | 2003-09-23 | New Zealand Forest Research Institute Limited | Wastewater treatment process for nitrogen-deficient feed in controlled environment |
| JP2017012659A (en) * | 2015-07-06 | 2017-01-19 | 有限会社 阪上販売 | Wetting prevention film for umbrella |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0532817A (en) | 1993-02-09 |
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